// Code that reproduces problem here
const json = {
 "firstName": "John",
 "'lastName'": "doe",
 "address": {
 "streetAddress": "naist street",
 "city": "Nara",
 "postalCode": "630-0192"
 },
 "phoneNumbers": [
 {
 "type": "iPhone",
 "number": "0123-4567-8888"
 },
 {
 "type": "home",
 "number": "0123-4567-8910"
 }
 ]
}
const normalizedPaths = JSONPath({ path: `$["'lastName'"]`, json, resultType: 'path', wrap: false })